Adjustable spanner capable of adjusting size of an opening rapidly

ABSTRACT

An adjustable spanner capable of adjusting size of an opening rapidly comprises a handle having a head and a fixing jaw; the handle having a sliding groove and a sliding path; an inner sliding path being extended with a shoulder; a movable jaw having a guide portion at one end thereof; a lower side of the guide portion having a teeth portion; a sliding block being installed in the sliding path; the sliding block having a teeth portion near the movable jaw and an elastic unit at a position far away from the movable jaw; and at least one pressible unit having an connecting unit and an operation portion; the connecting portion being connected to the sliding block; and the operation portion being at one side of the handle; an inner side of the pressible unit having buckling unit for resisting against the shoulder of the sliding path.

FIELD OF THE INVENTION

The present invention relates to adjustable spanners, and particularlyto an adjustable spanner capable of adjusting size of an openingrapidly, wherein two sliding blocks are not in contact to a shoulder ofthe sliding path of the handle so as to retain the steadiness inoperation. Thereby the defects of deformation from forging and heatprocessing and too many parts can be avoided. The size of the opening isadjustable rapidly and steadily.

BACKGROUND OF THE INVENTION

In many prior arts, such as U.S. Pat. No. 1,501,212, U.S. Pat. No.1,792,338, U.S. Pat. No. 2,582,591, U.S. Pat. No. 3,535,959, U.S. Pat.No. 3,817,128, U.S. Pat. No. 4,106,372, and U.S. Pat. No. 5,152,198, theadjustable spanners capable of adjusting size of an opening rapidly aredisclosed. However all the structures of the spanners are too completedto be made. The operation is unsteady so as to affect the error of theopening of the spanner. This is because in the forging process, theerror cannot be avoided, generally, the error is about 0.3 mm to 0.8 mm.This will induce that the grooves in the head of the handle cannot becontrolled precisely so that two pressible units are not symmetrical tothe center of the head of the handle. Further the heat process willcause the deformation of the parts of the handle so that when a cover islocked to a shoulder, the two sides will curl to affect the smoothnessin the pressing operation.

Although CNC lathe can be used to improve the above mentioned defectsfrom forging and heat processing, the CNC process is too expensive. Itis not economic to the manufacturing of the spanner.

SUMMARY OF THE INVENTION

Accordingly, the primary object of the present invention is to providean adjustable spanner capable of adjusting size of an opening rapidly,wherein two sliding blocks are not in contact to a shoulder of thesliding path of the handle to retain the steadiness in operation. Thedefects of deformation from forging and heat processing and too manyparts can be avoided. Thus the size of the opening can be adjustedrapidly and steadily.

To achieve above objects, the present invention provides an adjustablespanner capable of adjusting size of an opening rapidly. The adjustablespanner comprises a handle having a head and a fixing jaw; the handlehas a sliding groove and a sliding path; the sliding path being at holecommunicated to the sliding groove and penetrated through the head; aninner sliding path being extended with a shoulder; a movable jaw havinga guide portion at one end thereof; a lower side of the guide portionhaving a teeth portion; the guide portion being received in the slidinggroove so that the movable jaw being movable along the sliding groove; asliding block movable along a direction approach to or away from themovable jaw; the sliding block being installed in the sliding path; thesliding block having a teeth portion at a position near the movable jawand an elastic unit at a position far away from the movable jaw forengaging the teeth portion of the sliding block and the teeth portion ofthe movable jaw; and at least one pressible unit having an connectingunit and an operation portion; the connecting portion being connected tothe sliding block; and the operation portion being at one side of thehandle; an inner side of the pressible unit having buckling unit forresisting against a surface of the shoulder of the sliding path.

The various objects and advantages of the present invention will be morereadily understood from the following detailed description when read inconjunction with the appended drawing.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded schematic view of the adjustable spanner capableof adjusting size of an opening rapidly according to the presentinvention.

FIG. 1A is another schematic perspective view of the present invention.

FIG. 2 is a perspective view about the adjustable spanner capable ofadjusting size of an opening rapidly of the present invention.

FIG. 3 is a partial perspective view of the adjustable spanner capableof adjusting size of an opening rapidly of the present invention.

FIG. 4 is a plane view of the spanner in FIG. 2.

FIGS. 4A and 4B show the resisting operation of the present invention.

FIGS. 4C and 4D show the resisting operation of the buckling unit andthe elastic seal of the present invention.

FIG. 5 shows the exploded perspective view of the second embodiment ofthe adjustable spanner of the present invention.

FIGS. 5A and 5B shows the operation of the cross sectional view of thesecond embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

In order that those skilled in the art can further understand thepresent invention, a description will be provided in the following indetails. However, these descriptions and the appended drawings are onlyused to cause those skilled in the art to understand the objects,features, and characteristics of the present invention, but not to beused to confine the scope and spirit of the present invention defined inthe appended claims.

Referring to FIG. 1 to 4, the adjustable spanner capable of adjustingsize of an opening rapidly of the present invention is illustrated. Thepresent invention has the following elements.

A handle 10 has a head 11 at one end thereof. A fixing jaw 12 extendsfrom the head 11. A sliding groove 13 is longitudinally formed in thehead 11. A sliding path 14 is a long penetrating hole which formedtransversally in the head 11 and is communicated to the sliding groove13. However the penetrating hole 14 may be replaced by a hole with sealends. All these are within the scope of the present invention. An innerside of the sliding path 14 is protruded with a shoulder portion 15 atan inner periphery of the penetrating hole.

A movable jaw 20 has a guide portion 21. A configuration of the guideportion 21 is corresponding to the sliding groove 13. A lower side ofthe guide portion 21 is formed as a teeth portion 22. The teeth portion22 of movable jaw 20 is received within the sliding groove 13 so thatthe movable jaw 20 is movable along the sliding groove 13. A pin A isinserted through one open end of the sliding groove 13 so as to confinethe movement of the movable jaw 20 and thus the movable jaw 20 will notfall out of the sliding groove 13.

A sliding block 30 is a long block having a shape corresponding to thethat of the sliding path 14. The sliding block 30 is installed in thesliding path 14 of the handle 10 and is movable toward or away from themovable jaw 20. Each of two sides of the lower end of the movable jaw 20has a respective receiving groove 32 for receiving an elastic unit 33. Alower side of the elastic unit 33 resists against a bottom of thesliding path 14 so that a teeth portion 31 of the sliding block 30 isengaged to the teeth portion 22 of the movable jaw 20. Besides, a lowerside of the sliding path 14 is formed with a cruciform shape formthrough hole 34.

A pressible unit is included. In this embodiment, the sliding path 14 isa penetrating hole. Thus the pressible unit is formed by a first movablepart 41 and a second movable part 42. The first movable part 41 has afirst connecting portion 411 and a plurality of first operation blocks412. The second movable part 42 has a second connecting portion 421 anda plurality of second operation blocks 422. The first connecting portion411 can be buckled to the second connecting portion 421 to combine thefirst movable part 41 and the second movable part 42. In assembly, thefirst movable part 41 and second movable part 42 are located within thethrough hole 34 of the sliding block 30. The second operation block 412and the second operation block 422 are at two lateral sides of thehandle so that the user can press the operation blocks. The outer sidesof the first and second operation blocks are lower than outer sides ofthe head 11. The distance between the outer sides of the first andsecond operation blocks are smaller than a thickness of the head 11 sothat the operation blocks will not contact with a surface as theadjustable spanner is placed upon the surface.

The main feature of the present invention is that each of four cornersof the first movable part 41 has a receiving groove 413. Each receivinggroove 413 is installed with a spring 51 and a steel ball 52. Each ofthe four corners of the second movable part 42 has a hollow post 423. Ahollow portion of each hollow post has a spring 51 and a steel ball 52.When the first connecting portion 411 is engaged to the secondconnecting portion 421, all the steel balls 52 resist against outersurfaces of the shoulder 15. Thereby the first movable part 41 andsecond movable part 42 are not in contact with the shoulder surface 15.

Besides, an inner periphery of the first movable part 41 has a groove Bfor receiving an elastic seal 60. An inner periphery of the secondmovable part 42 has a groove B for receiving another elastic seal 60 sothat the seals 60 resist against the outer surfaces of the shoulder 15.After assembly, the first movable part 41 and second movable part 42will not in contact with the outer surfaces of the shoulder 15, as shownin FIGS. 4C and 4D.

Referring to FIGS. 4A, 4B, 4C, and 4D, in the present invention, by thespring, steel ball or the elastic seal, the first movable part 41 andsecond movable part 42 are not in contact with the outer surfaces of theshoulder 15. Thereby the pressible unit can be steadily pressed. Thecost in the installation of the present invention is cheap. No CNC latheis performed. The defects from error of the shoulder 15 and deformationof heat processing are avoided.

Referring to FIG. 5, 5A and 5B, in the present invention, in thisembodiment, only elastic seal 60 is used. The seals 60 are embedded intothe grooves B at an inner peripheries of the first movable part 41 andsecond movable part 42 so as to have the same effect. Moreover, theelastic seals 60 of the present invention have the effect of dust-proofso that the dust powders will not fall into the sliding path 14. Aninner side and two lateral sides of the elastic seal resist against theouter surface of the shoulder and a stop extended from a top of theelastic seal resists against the sliding block 30.

The present invention is thus described, it will be obvious that thesame may be varied in many ways. Such variations are not to be regardedas a departure from the spirit and scope of the present invention, andall such modifications as would be obvious to one skilled in the art areintended to be included within the scope of the following claims.

1. An adjustable spanner capable of adjusting size of an opening rapidlycomprising: a handle having a head and a fixing jaw; the handle having asliding groove and a sliding path; the sliding path being at a holecommunicated to the sliding groove and penetrated through the head; aninner sliding path being extended with a shoulder; a movable jaw havinga guide portion at one end thereof; a lower side of the guide portionhaving a teeth portion; the guide portion being received in the slidinggroove so that the movable jaw being movable along the sliding groove; asliding block movable along a direction approach to or away from themovable jaw; the sliding block being installed in the sliding path; thesliding block having a teeth portion at a position near the movable jawand an elastic unit at a position far away from the movable jaw forengaging the teeth portion of the sliding block and the teeth portion ofthe movable jaw; and at least one pressible unit having a connectingunit and an operation portion; the connecting portion being connected tothe sliding block; and the operation portion being at one side of thehandle; an inner side of the pressible unit having a buckling unit forresisting against a surface of the shoulder of the sliding path; andwherein the buckling unit is a spring and a steel ball.
 2. Theadjustable spanner capable of adjusting size of an opening rapidly asclaimed in claim 1, wherein the pressible unit has a first movable partand a second movable part; each first movable part having a connectingportion; the connecting portions of the first movable part and secondmovable part are located at two sides of the sliding path.
 3. Theadjustable spanner capable of adjusting size of an opening rapidly asclaimed in claim 1, wherein an outer side of the pressible unit is lowerthan an outer side of the head.
 4. The adjustable spanner capable ofadjusting size of an opening rapidly as claimed in claim 2, wherein anouter side of the pressible unit is lower than an outer side of thehead.
 5. The adjustable spanner capable of adjusting size of an openingrapidly as claimed in claim 1, wherein a pin is inserted through oneopen end of the sliding groove so as to confine the movement of themovable jaw and thus the movable jaw will not fall out of the slidinggroove. 6-7. (canceled)
 8. The adjustable spanner capable of adjustingsize of an opening rapidly as claimed in claim 1, wherein an inner sideand two lateral sides of the elastic seal resist against the outersurface of the shoulder and a stop extended from a top of the elasticseal resists against the sliding block.